如图所示，小明与小华用细棉线连接了两个纸杯，制成了一个“土电话”．（1）他们用“土电话”能实现10m间的通话，这表明_1（2）相距同样远，讲话者以相同的响度讲话，如果改用细金属丝连接“土电话”，则听到_刷题宝

题干

如图所示，小明与小华用细棉线连接了两个纸杯，制成了一个“土电话”．

（1）他们用“土电话”能实现10m间的通话，这表明____

（2）相距同样远，讲话者以相同的响度讲话，如果改用细金属丝连接“土电话”，则听到的声音就大些．这一实验表明：____

（3）如果用“土电话”时，另一个同学捏住棉线的某一部分，则听的一方就听不到声音了，这是由于____

（4）如果在用“土电话”时，线没有拉直而处于松驰状态，则听的一方通过棉线____ （选填“能”或“不能”）听到对方的讲话．

（5）此“土电话”____ （选填“能”或“不能”）在月球上使用．

上一题下一题 0.0难度选择题更新时间:2018-05-04 12:37:23

答案(点此获取答案解析）

固体（细棉线）可以传声,细金属丝比细棉线传声效果好,棉线停止了振动,不能,不能

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